Actually ..being a wildlife expert that I am...this gull is female. Obviously she is talking to her mate...who doesn't appear to be listening. Hence we note the tense body language, and subsequent enlargement of the glossopharyngeal cavity.

This is very common to most species that mate and raise young...

However you'll note that in horses and other ungulates..it doesn't occur..since the male stallion place a minor role in the rearing process...

Actually ..being a wildlife expert that I am...this gull is female. Obviously she is talking to her mate...who doesn't appear to be listening. Hence we note the tense body language, and subsequent enlargement of the glossopharyngeal cavity.

This is very common to most species that mate and raise young...

However you'll note that in horses and other ungulates..it doesn't occur..since the male stallion place a minor role in the rearing process...